<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0,maximun-scale=10">
    <title>Document</title>
    <style>
        @media screen and (max-width:575px) {
            body{
                background-color: blue;
            }
        }

        @media screen and (max-width:575px) {
            body{
                background-color: yellow;
            }
        }

        
        @media screen and (max-width:768px) {
            body{
                background-color: grey;
            }
        }
        @media screen and (max-width:992px) {
            body{
                background-color: pink;
            }
        }
        @media screen and (max-width:1200px) {
            body{
                background-color: yellowgreen;
            }
        }
        #concer{
            width: 991px;
            height: 600px;
            border:1px solid red;
        }
    </style>
</head>
<body>
    <div class="concer"></div>

</body>
</html>